Delegated Authorisation Chain

Expanded Definition

A delegated authorisation chain is more than a single approval step. It is the full path by which authority is passed from a human requester to an agent, service, or payment system, then onward through protocols, tokens, and downstream tools until an action is executed. In NHI and AI commerce contexts, the chain often spans multiple trust domains, so the security question is not only “who can act” but “who can prove how authority moved.” That makes the chain central to auditability, non-repudiation, and bounded delegation.

Definitions vary across vendors, especially when an AI agent is allowed to call other agents or services on behalf of a user. NHI Management Group treats the term as a governance pattern, not a single product feature, and aligns it with least privilege, traceable delegation, and explicit expiry. For broader identity controls, the NIST Cybersecurity Framework 2.0 remains a useful reference for access governance and traceable control design.

The most common misapplication is treating delegated authority as a one-time login event, which occurs when service tokens or agent permissions outlive the original user intent.

Examples and Use Cases

Implementing delegated authorisation chains rigorously often introduces friction, requiring organisations to weigh automation speed against the cost of tighter evidence capture and narrower delegation scopes.

• An employee asks an AI agent to order supplies, and the request is translated into a protocol call, a scoped token, and a payment approval that must remain attributable end to end.
• A helpdesk workflow lets one service account request temporary access on behalf of a technician, but every handoff must be logged so the delegation path can be reconstructed later.
• A marketplace assistant initiates checkout using a wallet credential, then passes through a payment service and risk engine before finalising the transaction, creating a chain that must be auditable across systems.
• In a federated toolchain, one agent calls another agent to retrieve inventory data, and each hop should preserve the original intent, the scope granted, and the expiry conditions.
• Security teams reviewing incidents often compare the live delegation path against research such as the DeepSeek breach to understand how hidden credentials and exposed systems can turn a simple request into a broad compromise.

For implementation patterns involving scoped identity and token handoff, NIST Cybersecurity Framework 2.0 offers a practical governance baseline, even though it does not define this term explicitly.

Why It Matters in NHI Security

Delegated authorisation chains matter because attackers rarely need to break every control if they can exploit one weak hop in the chain. A permissive token, an overbroad agent grant, or a missing expiry can let a harmless request become an unauthorised action. In NHI environments, this is especially dangerous because machine identities can move faster than human review, and the evidence of who authorised what can fragment across chat, API, and payment layers.

NHIMG research shows how quickly compromise can turn operational: in LLMjacking: How Attackers Hijack AI Using Compromised NHIs, exposed AWS credentials were attempted within an average of 17 minutes. That speed compresses the time available to detect misuse inside any delegated path. It also reinforces why secrets handling matters, especially given the remediation delays highlighted in The State of Secrets in AppSec.

Organisations typically encounter the consequences only after a disputed transaction, an over-authorised agent action, or a credential leak forces investigators to reconstruct the delegation chain, at which point the term becomes operationally unavoidable to address.

Related resources from NHI Mgmt Group

• Agentic Supply Chain
• Delegated Access Chain
• Delegated Execution Chain
• Delegated AI Action Chain